White Scars Legionary

First strike, haste
Deadly Speed: when White Scars Legionary enters
the battlefield, target creaturegets first strike and haste until end of turn
{1}{r}{w}{b}{t}: target creature gets +2/+2, trample, double strike and menace until end of turn
"If you can see us, we are dangerous indeed. But that
is as nothing to the peril you face if you cannot see us,
and all you can hear is our laughter."